ClassCastException: InputStep.message expects class String but received class CpsClosure2

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      I have the pipeline skeleton (see code below) and the Input Step fails (see error below).

      Code:

      deployRequested = false

pipeline {
    agent any
	
	
	parameters {
		choice( choices: ['linux' , 'windows', 'all' ], description: 'OS to buid & publish the distribution package for', name: 'OS_TARGET')
	}

    stages {
		stage('Build Distribution(s)'){
			parallel {
				stage ('Build Linux Distribution') {
					when {
						expression { params.OS_TARGET == 'linux' || params.OS_TARGET == 'all'  }
					}
					steps {
						echo "Building Linux distribution..."
						//TODO
					}
				}
				stage ('Build Windows Distribution') {
					when {
						expression { params.OS_TARGET == 'windows' || params.OS_TARGET == 'all' }
					}
					steps {
						echo "Building Windows distribution..."
						//TODO
					}
				}
			}
		}
		stage('Deploy Approval') {	
			steps {
				script {
					try {
						input {
							id 'deploy-approval'
							message 'Would you like to deploy?'
							ok 'Deploy'
							submitterParameter 'deploy-approved-by'
							parameters { 
								agentParameter('TARGET_NAME') 
							}
						}
						deployRequested = true
						echo "Deployment to ${params['TARGET_NAME']} requested by ${params['deploy-approved-by']}"
						validateTargetNode()
					} catch (err) {
						deployRequested = false
						echo err.toString()
					}
				}
			}
		}
		
		stage('Deploy to Target') {
			when {
				expression { params['TARGET_NAME'] != 'master' && deployRequested == true }
			}
			agent { label params['TARGET_NAME'] }
			steps {			    
			    echo "Deploying..."
                           //TODO
			}		    
		}
    }
}
def validateTargetNode() {
    if ("${target_name}" == 'master') {
		unstable("Cannot deploy on Master")
	}
}

       

      Error:

      java.lang.ClassCastException: org.jenkinsci.plugins.workflow.support.steps.input.InputStep.message expects class java.lang.String but received class org.jenkinsci.plugins.workflow.cps.CpsClosure2
	at org.jenkinsci.plugins.structs.describable.DescribableModel.coerce(DescribableModel.java:492)
	at org.jenkinsci.plugins.structs.describable.DescribableModel.buildArguments(DescribableModel.java:409)
	at org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:329)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:269)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:179)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:122)
	at sun.reflect.GeneratedMethodAccessor660.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:163)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:161)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:165)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:135)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:135)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
Caused: java.lang.IllegalArgumentException: Could not instantiate {message=org.jenkinsci.plugins.workflow.cps.CpsClosure2@1339c368} for org.jenkinsci.plugins.workflow.support.steps.input.InputStep
	at org.jenkinsci.plugins.structs.describable.DescribableModel.instantiate(DescribableModel.java:334)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeStep(DSL.java:269)
	at org.jenkinsci.plugins.workflow.cps.DSL.invokeMethod(DSL.java:179)
	at org.jenkinsci.plugins.workflow.cps.CpsScript.invokeMethod(CpsScript.java:122)
	at sun.reflect.GeneratedMethodAccessor660.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93)
	at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213)
	at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1022)
	at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:42)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:163)
	at org.kohsuke.groovy.sandbox.GroovyInterceptor.onMethodCall(GroovyInterceptor.java:23)
	at org.jenkinsci.plugins.scriptsecurity.sandbox.groovy.SandboxInterceptor.onMethodCall(SandboxInterceptor.java:157)
	at org.kohsuke.groovy.sandbox.impl.Checker$1.call(Checker.java:161)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:165)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:135)
	at org.kohsuke.groovy.sandbox.impl.Checker.checkedCall(Checker.java:135)
	at com.cloudbees.groovy.cps.sandbox.SandboxInvoker.methodCall(SandboxInvoker.java:17)
	at WorkflowScript.run(WorkflowScript:38)
	at ___cps.transform___(Native Method)
	at com.cloudbees.groovy.cps.impl.ContinuationGroup.methodCall(ContinuationGroup.java:86)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.dispatchOrArg(FunctionCallBlock.java:113)
	at com.cloudbees.groovy.cps.impl.FunctionCallBlock$ContinuationImpl.fixArg(FunctionCallBlock.java:83)
	at sun.reflect.GeneratedMethodAccessor449.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.cloudbees.groovy.cps.impl.ContinuationPtr$ContinuationImpl.receive(ContinuationPtr.java:72)
	at com.cloudbees.groovy.cps.impl.ClosureBlock.eval(ClosureBlock.java:46)
	at com.cloudbees.groovy.cps.Next.step(Next.java:83)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:174)
	at com.cloudbees.groovy.cps.Continuable$1.call(Continuable.java:163)
	at org.codehaus.groovy.runtime.GroovyCategorySupport$ThreadCategoryInfo.use(GroovyCategorySupport.java:129)
	at org.codehaus.groovy.runtime.GroovyCategorySupport.use(GroovyCategorySupport.java:268)
	at com.cloudbees.groovy.cps.Continuable.run0(Continuable.java:163)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.access$001(SandboxContinuable.java:18)
	at org.jenkinsci.plugins.workflow.cps.SandboxContinuable.run0(SandboxContinuable.java:51)
	at org.jenkinsci.plugins.workflow.cps.CpsThread.runNextChunk(CpsThread.java:185)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:400)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$400(CpsThreadGroup.java:96)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:312)
	at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:276)
	at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:67)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:136)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

            Assignee:
            Unassigned
            Reporter:
            Cedric H
            Archiver:
            Jenkins Service Account

              Created:
              Updated:
              Archived: